Improvement in apparatus for the manufacture of nitro-glycerine



. G. M. MO'WBRAY. APPARATUS FOR THE MANUFAGTURE 0F NITROGLYGERINE,

NITROBBNZOLB, 8w.

N0..106,6 07. Patented Aug. 23. 1870.

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GEORGE M. MOWBRAY, or NORTH ADAMS, MASSAoHUSETTs.

Letters Pate at No. 106,607, dated August 23, 1870.

The Schedule referred to in these Letters Patent and making part of the same.

, I, GEORGE M. 1\IOWBRAY, of North Adams, in the county of Berkshire and State of lvfassachusetts, have invented certain Improvements in Apparatus for Manufacturing Nitro-Glycerine, NitroBenzole,

8m, oil which the following is'a specification.

The nature and object of my invention is an appa v ratus to be used for mixing and combining glyccriue, benzolc,'and similar matters, with nitric and sulphuric acids (previously mixed and cooled) in a continuous and automatic manner, delivering the mixed ingredients, cooled and free from nitrous fumes, into water, so as to precipitate therein the nitro-glycerine, nitro benzole, &c., thecontinuation of the work or operation being limited only by-the supply of the requisite materials and motive power. A

In respect to continuance of the operation, my inven'tion differs from every method hitherto practiced or described, since all former modes of mamifacturing these preparations are alternate.

Desmft'ptt'on of the Drawings.

A, spindle,

B B, centrifugal basin 0 O, annular plate, with radial fans on its lower surface and attached to basin B B,

D, revolving paddle or stirrer r 1*], tank, lined with lead, for'mixed acids;

F, delivery-pipe, for conducting and gauging acids to centrifugal basin.

G, tank for glyce1'ine,-benzole, 8m:

' H, delivery-pipe for conducting and gauging glycer rinc, benzole, &c'., to centrifugal basin,

I, collecting-rim or receiving-surface, of lead or enameled iron, to receives'pray of mixed ingredients distributed by centrifugal basin B BI J J, bracketed slats, forming an ice-strainer,-

K K'K K, ice.

L, cold-water supply-pipe.

M, refuse acid water waste-pipe;- b N, nitro-glycerine delivery-pipe of vulcanized rub- O 0 O O, suspended floor or cover, to sustain ice supply,

P l P, precipitating tank Q, pulley arrangement, for transmitting mouou 1t, belt, giving motion -to pulley;

S, separating diaphragm. The acid water passing under this diaphragm A deposits the nitro glycerine, &c., and passes in the direction of thearrows out ofthe tank by the eduction-pipe M,

tionatc supply of mixed sulphuric and nitric acids, in

relation to'the requisite supply of glycerine, areallowed-each of them, to flow onto the lower basin B B, which, by its centrifugal motiou-v First, mixes theingredients.

Second, extends the mixed ingredients over considerable superficies, thereby enabling the nitrous fumes to leave the mixture readily, while the peculiar shape of the basin B B slightly retards the liquid mixture in its fiow.

Meanwhile, the annular disk 0 0, being armed on its lower surface with radial fans, sweeps a current of ice-cold air, drawn from the ice supply K K K, over .the surface of the mixture, and cools it by contact,

and said air having taken up the nitrous fumes (evolved by the action of themixed acids on the glycerine) and cooled the mixture, as-hefore described, passes on toward the stares of the tank, in the direction of the arrows aa, a a, up through the ice, resting on the bracketed slats or ice-strainer J J, where it is stripped of its nitrous fumes, again. cooled, and is again drawn toward the spindle A iii continuous circulation.

Third,. the mixed acids and" glycerine having air-- rived at the periphery of the basined disk B B, (having been cooled and deprived of nitrous fumes, as

above described, by the ice-cold air,) are thrown onto the reoeiving-rim or plate I I, and thence flow by their own gravity into the water XV, contained in the tank P P I. The excess of acid is now taken up by the water,

and the nitro-glyceriue is precipitated on the floor of the .tank. The acid water passing out of the \vaste-. pipe M, the nitro-glycerine is collected by means of the flexible vulcanized pipe N N.

The revolution of the spindle A revolves the paddle or stirrer D, thus causing a circulation of the water in the tank P P P, which water presents fresh surfaces oo1 1tiuually for the acid ingredients streaming from the rim I I to mingle with.

'What I'claim as my invention, and desire to secure by Letters Patent, is-

1. The spindle A, paddle or stirrer I), lower centrifugal basin B B, with the upper annular disk and attachments G 0, arranged substantiaily as described and for the purposes set forth.

2. The sheltered or partially covered tank P P P, with the inner rim I I, bracketed slats J J, suspended ice-floor O O O O, inlet-pipe L, waste-outlet M, and nitro-glycerine, 850., eduction-pipe N, arranged substantially as described, an'd'for the purposes set Witnesses:

A. B. STOUGHTON, EDMUND MAssolfc. 

